hw/an5206.c

   1 /*
   2  * Arnewsh 5206 ColdFire system emulation.
   3  *
   4  * Copyright (c) 2007 CodeSourcery.
   5  *
   6  * This code is licensed under the GPL
   7  */
   8
   9 #include "hw.h"
  10 #include "mcf.h"
  11 #include "boards.h"
  12 #include "loader.h"
  13 #include "elf.h"
  14 #include "exec-memory.h"
  15
  16 #define KERNEL_LOAD_ADDR 0x10000
  17 #define AN5206_MBAR_ADDR 0x10000000
  18 #define AN5206_RAMBAR_ADDR 0x20000000
  19
  20 /* Board init.  */
  21
  22 static void an5206_init(ram_addr_t ram_size,
  23                      const char *boot_device,
  24                      const char *kernel_filename, const char *kernel_cmdline,
  25                      const char *initrd_filename, const char *cpu_model)
  26 {
  27     CPUState *env;
  28     int kernel_size;
  29     uint64_t elf_entry;
  30     target_phys_addr_t entry;
  31     MemoryRegion *address_space_mem = get_system_memory();
  32     MemoryRegion *ram = g_new(MemoryRegion, 1);
  33     MemoryRegion *sram = g_new(MemoryRegion, 1);
  34
  35     if (!cpu_model)
  36         cpu_model = "m5206";
  37     env = cpu_init(cpu_model);
  38     if (!env) {
  39         hw_error("Unable to find m68k CPU definition\n");
  40     }
  41
  42     /* Initialize CPU registers.  */
  43     env->vbr = 0;
  44     /* TODO: allow changing MBAR and RAMBAR.  */
  45     env->mbar = AN5206_MBAR_ADDR | 1;
  46     env->rambar0 = AN5206_RAMBAR_ADDR | 1;
  47
  48     /* DRAM at address zero */
  49     memory_region_init_ram(ram, NULL, "an5206.ram", ram_size);
  50     memory_region_add_subregion(address_space_mem, 0, ram);
  51
  52     /* Internal SRAM.  */
  53     memory_region_init_ram(sram, NULL, "an5206.sram", 512);
  54     memory_region_add_subregion(address_space_mem, AN5206_RAMBAR_ADDR, sram);
  55
  56     mcf5206_init(AN5206_MBAR_ADDR, env);
  57
  58     /* Load kernel.  */
  59     if (!kernel_filename) {
  60         fprintf(stderr, "Kernel image must be specified\n");
  61         exit(1);
  62     }
  63
  64     kernel_size = load_elf(kernel_filename, NULL, NULL, &elf_entry,
  65                            NULL, NULL, 1, ELF_MACHINE, 0);
  66     entry = elf_entry;
  67     if (kernel_size < 0) {
  68         kernel_size = load_uimage(kernel_filename, &entry, NULL, NULL);
  69     }
  70     if (kernel_size < 0) {
  71         kernel_size = load_image_targphys(kernel_filename, KERNEL_LOAD_ADDR,
  72                                           ram_size - KERNEL_LOAD_ADDR);
  73         entry = KERNEL_LOAD_ADDR;
  74     }
  75     if (kernel_size < 0) {
  76         fprintf(stderr, "qemu: could not load kernel '%s'\n", kernel_filename);
  77         exit(1);
  78     }
  79
  80     env->pc = entry;
  81 }
  82
  83 static QEMUMachine an5206_machine = {
  84     .name = "an5206",
  85     .desc = "Arnewsh 5206",
  86     .init = an5206_init,
  87 };
  88
  89 static void an5206_machine_init(void)
  90 {
  91     qemu_register_machine(&an5206_machine);
  92 }
  93
  94 machine_init(an5206_machine_init);